They wouldn't fund it and the hell to be payed would not be in congress but the next prez election when a dem wins by a crazy majority. I think you must be living in a bubble world to think americans support fighting another war in the ME. They want us out of the one we're in now. That's from my personal prespective of course but I do live in red state Kentucky and not a single person I've spoken to is happy with Bush or the wars he's started.
What Lincoln did was unconstitutional and wrong. If Bush tried it there would be problems. I see him getting his butt impeached if he attacked Iran with out congressional aproval.